Portia de Rossi to Address Eating Disorders, Sexuality in Memoir

The Australian-born star, best known for her roles in Ally McBeal,Arrested Development, and most recently Better Off Ted, has signed a deal with Atria Books to publish a book chronicling her years of battling anorexia and bulimia in the public eye.

The book also will delve into de Rossi's newfound health and happiness after coming out as a lesbian and marryingEllen DeGeneres in August 2008. Getting married "completely changed my life," de Rossi told PEOPLE last year. "It's so important to live an honest, open life and I didn't really realize that until I started doing it."